gardena fertilizer dispenser for incorporating the universal liquid fertilizer gardena (8303). Grand opening. with level indication. vacuum valve for the winter. connection for supply and distribution with pipes. with the "quick & easy" connection. part of the gardena micro-drip-system, a water saving method to uniformly deliver a targeted amount of water directly to the plant through continuous drops. the ground remains soft and even water and evaporation or runoff of water is limited.